[llvm] [LangRef] inline asm: the instructions are treated opaquely (PR #157080)

[Patrick Simmons via llvm-commits]

linuxrocks123 wrote:

@programmerjake @gonzalobg thank you for these suggestions.  For each of these suggestions, if the user used, for instance, GCC, which does not support this backend feature in its AMDGPU backend, would your suggested directive be ignored, or would the user encounter a compiler error?

https://github.com/llvm/llvm-project/pull/157080